{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{4}{c}{\specialcell{\;\;\;\;\; Drinking water fecal contamination \;\;\;\;\;}}\\\cmidrule(lr){2-5}
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   &\multicolumn{1}{c}{(3)}   &\multicolumn{1}{c}{(4)}   \\
\hline
Source fecal contamination&       0.127   &       0.805   &      -1.798   &      -4.809   \\
                    &     (0.422)   &     (0.830)   &     (5.721)   &    (11.341)   \\
Travel time in minutes, measured&      -0.450   &      -1.361   &      -1.592   &      -2.438   \\
                    &     (0.630)   &     (1.538)   &     (3.732)   &     (5.836)   \\
Constant            &      -0.042   &               &      -0.019   &               \\
                    &     (0.027)   &               &     (0.104)   &               \\
\hline
Sanderson-Windmeijer F-statistic: FC&        4.96   &        2.04   &        0.16   &        0.22   \\
Angrist-Pischke F-statistic: FC&        5.52   &        3.21   &        0.17   &        0.24   \\
Sanderson-Windmeijer F-statistic: Distance&        1.90   &        1.10   &        0.17   &        0.37   \\
Angrist-Pischke F-statistic: Distance&        2.37   &        1.49   &        0.80   &        1.46   \\
Predicted location  &        Desk   &        Desk   &   Algorithm   &   Algorithm   \\
Treatment unit fixed effects&          No   &         Yes   &          No   &         Yes   \\
N                   &        5832   &        5832   &        5832   &        5832   \\
\hline\hline
\end{tabular}
}
